"I am only a Goddess to the sluggish minds of the Insect-men," she explained in answer to Ripon's question. "To our own people of the Lost Caverns I am simply the daughter of one of the nobles."

"I knew your father thirty years ago," Ripon said.

"He has always told me that other men from Earth would come some day."

"Your father can tell me most of the things I want to know, but I am wondering how you managed to survive up there on the surface where there is little or no air and it is always so cold."

"I could not stay very long." From a fold in her loin cloth the girl drew out a tightly closed glass bottle that held some white tablets. "These contain oxygen mixed with some gases unknown on Earth, the whole very strongly compressed into solid form. Ten minutes after I swallow one, it is safe for me to go out on the surface. The effect lasts for about fifteen minutes."

"Pretty risky if anything delays you," Larry said. Diana shrugged, and her blue eyes grew somber.

"Someone has to do it. The loyalty of the Insect-men is our greatest protection against the evil Lords of Gral-Thala. This is the first time there has ever been anything like a revolt among the Insect-men. I do not know what lies behind it, but it probably means trouble for us of the Lost Caverns."

Colton was the last to come down the rocky shaft. Larry noticed that the second officer was ill at ease, disinclined to meet his eyes, and wondered if Colton was ashamed of either his late entry into the fight or his fear of coming down into the Moon's interior. Hardly likely! From what he knew of Gerald Colton, the man was not likely to be ashamed of anything he did.

They went through a maze of gray walled passages, still trending downward. Once or twice Larry thought he heard stealthy footsteps behind them, but there was no one in sight when he looked back. On several occasions they passed sentries wearing a makeshift armor, who saluted Diana with long bladed swords. Sometimes they spoke to her in English with a peculiar soft accent, sometimes in that strange tongue that Diana had first used.

Larry noticed that these Lunarians looked only slightly different from the peoples of Earth. They had larger eyes, and a greater delicacy of feature. The principle distinguishing feature was their very thin legs. Often they had wide shoulders and deep chests, but since they did not need strong supporting muscles in view of the Moon's slight gravity their legs were thin and narrow.